Wisbech Grammar School is an independent school in Wisbech, Cambridgeshire for ages 4 to 18. It was founded in 1379 by the Guild of the Holy Trinity and is therefore one of the oldest surviving schools. Recent major expansions of the school buildings include a junior school assembly hall, 2 junior classrooms and a sixth form centre building. The school is a member of the Headmasters' and Headmistresses' Conference.
Wisbech Grammar School has a total of 545 pupils, with 107 pupils in the Sixth Form.